package zipfiles;import java.awt.*;import java.awt.event.*;import javax.swing.*;import com.borland.jbcl.layout.*;import java.io.*;import java.util.*;import java.util.zip.*;public class Frame1 extends JFrame {  JPanel contentPane;  VerticalFlowLayout verticalFlowLayout1 = new VerticalFlowLayout();  Button button1 = new Button();  Button button2 = new Button();  Label label1 = new Label();  File source = null , target = null;  /**Construct the frame*/  public Frame1() {    enableEvents(AWTEvent.WINDOW_EVENT_MASK);    try {      jbInit();    }    catch(Exception e) {      e.printStackTrace();    }  }  /**Component initialization*/  private void jbInit() throws Exception  {    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));    contentPane = (JPanel) this.getContentPane();    button1.setLabel("選擇文件");    button1.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        button1_actionPerformed(e);      }    });    contentPane.setLayout(verticalFlowLayout1);    this.setResizable(false);    this.setSize(new Dimension(350, 151));    this.setTitle("壓縮文件演示程序");    button2.setLabel("輸出壓縮文件");    button2.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        button2_actionPerformed(e);      }    });    label1.setText("所選擇的文件：");    verticalFlowLayout1.setAlignment(VerticalFlowLayout.MIDDLE);    verticalFlowLayout1.setHgap(15);    verticalFlowLayout1.setVgap(15);    contentPane.add(button1, null);    contentPane.add(button2, null);    contentPane.add(label1, null);  }  /**Overridden so we can exit when window is closed*/  protected void processWindowEvent(WindowEvent e) {    super.processWindowEvent(e);    if (e.getID() == WindowEvent.WINDOW_CLOSING) {      System.exit(0);    }  }  void button1_actionPerformed(ActionEvent e) {    JFileChooser jfc = new JFileChooser();    String filepath = null;    int returnVal = jfc.showOpenDialog(this);    if(returnVal == JFileChooser.APPROVE_OPTION){     source = jfc.getSelectedFile();     filepath = source.getPath();     label1.setText("所選擇的文件："+filepath);    }  }  void button2_actionPerformed(ActionEvent e) {    JFileChooser jfc = new JFileChooser();    //ExtensionFileFilter filter = new ExtensionFileFilter();    //FileFilter filter = new FileFilter();    //filter.addExtension("zip");    //filter.setDescription("ZIP Files");    //jfc.setFileFilter(filter);    String filepath = null;    int returnVal = jfc.showSaveDialog(this);    if(returnVal == JFileChooser.APPROVE_OPTION){     target = jfc.getSelectedFile();     filepath = target.getPath();     zipFile(target);    }    }    private void zipFile(File target){      if(source !=null){       try{          label1.setText("正在壓縮文件："+filepath+"...");          FileOutputStream f =  new FileOutputStream(target);          ZipOutputStream out = new ZipOutputStream(new DataOutputStream(f));          DataInputStream in = new DataInputStream(new FileInputStream(source));          out.putNextEntry(new ZipEntry(source.getPath()));          int c;          while((c = in.read()) != -1)            out.write(c);          in.close();          out.close();          label1.setText("文件壓縮成功："+target.getPath());        }catch(Exception e){          label1.setText("文件壓縮失敗："+target.getPath());          }      }      else        label1.setText("請先選擇一個需要壓縮的文件");   }}